+;;; 53: (2005-02-22) Something introduced in SBCL 0.8.19.26 (give or take
+;;; a couple of patches) invalidated some FFI-related fasls. Probably
+;;; caused by "lazy alien resolution improvements".
+;;; 54: (2005-03-22) At least "0.8.20.6: Make FILE-STREAM and STRING-STREAM
+;;; potential mixins in CLOS" and "0.8.20.21: Add immediate single-floats
+;;; on x86-64."
+;;; 55: (2005-04-06) EXTERN-ALIEN-NAME logic moved from fixups to
+;;; FIND-FOREIGN-SYMBOL-IN-TABLE &co.